Drill depth and angle guide for hand drill



Dec. 29, 1970 H JENSEN 3,550,481

DRILL DEPTH AND ANGLE GUIDE FOR HAND DRILL Filed Jan. 22, 1969 1 o o Mi 4 I W MWHL Ill mwmwmwmmi mmmmgjw nq u m INVISN'IUR.

HARRY M. Je/vsew United States Patent O 3,550,481 DRILL DEPTH AND ANGLE GUIDE FOR HAND DRILL Harry M. Jensen, 97 E. 4th St. N., Monroe, Utah 84754 Filed Jan. 22, 1969, Ser. No. 792,965 Int. Cl. B2311 49/00 US. Cl. 77-55 4 Claims ABSTRACT OF THE DISCLOSURE A device which supports a hand type electric drill in a detachable manner and is provided with means for setting the depth to which a drill bit operated by the drill can penetrate a work piece as well as setting the angle at which the bit enters the workpiece.

SUMMARY OF THE INVENTION In my invention a drill supporting clamp can be slid back and forth along a rod to any position thereon. The rod is constrained at one end and is pivotable thereabout. The pivoting action permits the angle of attack of the drill bit to be set as desired and the sliding action sets the depth of penetration.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a side view of my invention;

FIG. 2 is a front view thereof;

FIG. 3 is a top view of a supporting foot;

FIG. 4 is a top view of my invention; and

FIG. 5 is a detail view of a portion of my invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT Referring now to FIGS. 1-5, a circular clamp 1 adjustable in diameter is connected to block 2. Block 2 has a vertical bore through which a depth gauge rod 3 extends and as a set screw thumb operated for permitting block 2, which otherwise slides along rod 3, to be locked in position thereon.

The bottom end of rod 3 extends into the top end of a hollow vertical tube 5. Tube 5 has a vertical slot 11 in which guide pin 6 extending horizontally outward from rod 3 extends. This pin prevents the rod from rotating or pulling out of the tube. A return spring 7 disposed in the tube extends between rod 3 and the other end of the tube. This other end of the tube terminates in an angle gauge 8 connected to foot 9 and adjustable by screw 10. The gauge 8 is marked in degrees.

Collar 4 with its set screw can he slid along rod 3 to desired position and locked to set for depth of hole or countersink.

Block 2 can have two threaded bores 2A and 2B for aligning rod and the tube evenly with the bit being used as some drills slope toward the rear on the back. Legs on the block can provide a solid fit on drills that are not smooth on top.

Rod 3 can be calibrated into sixteenths of an inch.

The return spring compresses as the rod is pushed down into the tube and expands then to push the rod back to starting position.

The foot can be placed flat against the surface of the work piece to be drilled or countersunk.

While I have described my invention with particular reference to the drawings, such is not to be considered as limiting its actual scope.

Having thus described this invention, what is asserted as new is:

1. A device comprising:

a foot;

an angle gauge secured to said foot;

a hollow tube secured at one end to said gauge and pivotable thereabout;

a rod having one end disposed in said tube; and

a circular clamp slidably secured to said rod.

2. A device as set forth in claim 1 wherein said one rod end has a transversely extending pin and said tube has a vertical slot, said pin being slidable in said slot.

3. A device as set forth in claim 2 further including a return spring disposed in said tube and extending axially therealong between said rod and said angle gauge.

4. A device as set forth in claim 3 further including a collar slidably secured on said rod between said clamp and said tube.

References Cited UNITED STATES PATENTS FRANCIS S. HUSAR, Primary Examiner US. Cl. X.R. 145-129 

